Exhaust-nozzle.



PATENTED MAY 29, 190.6.

G. S. MILLS.

EXHAUST NOZZLB.

APPLICATION FILED MG12, 190s.

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PATENTED MAY 29, 1906.

C. S. MILLS. EXHAUST NOZZLE.

APPLICATION FILED AUG.12, 1905.

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CHARLES S.- MILLS, OF NORWOOD, MASSACHUSETTS.

EXHAUST--NOZZLEI Specification of Letters Patent.

Applicatoniiled August 12, 1905. Serial No. 273,858.

Patented May 29, 1906.

To a/ZZ whom t may concern.-

Be it known that l, CHARLES S. MILLs, a

citizen of the United States, residing at Norwood, in the county ofNorfolk and State of Massachusetts, have invented new and usefulImprovements in Exhaust-Nozzles, of which the following is aspecification.

n This inventionrelates to exhaust-nozzles for steam-engines, and isparticularly adapted for use in locomotives.

The object of the invention is to increase the draft in theexhaust-passages leading from the cylinders of the engine and to thusreduce the back pressure in the said cylinders.

The invention consists in the combination and arrangement of parts setforth in the following-specification and particularly pointed out in theclaims thereof.

Referring to the drawings, Figure 1 is a vertical transverse section,partly in elevation, taken across the cylinders, smoke-box, andsmoke-stack of a locomotive with my improved exhaust-nozzle attachedthereto. Fig. 2 is a side elevation of my improved exhaust-nozzle. Fig.3 is a section, partly in elevation, taken on line 3 3 ,Fig 1, lookingdownwardly in said figure. Fig. 4 is a side elevation, partly insection, of a modified form of my invention. Fig. 5 is a section, ]artlyin elevation, taken on either line 5 5,

ig. 4, viewed from the front of the locomotive. Fig. 6 is a section,partly in elevation, taken on line 6 6, Fig. 5, looking downwardly insaid figure. Fig. 7 is a section, partly in elevation, taken on line 77, Fig. 5, looking downwardly in said figure. Fig. 8 is a plan View ofanother modified form of my invention. Fig. 9 is a section, partly inelevation, taken on line 9 9, Fig. 8. Fig. 10 is a section, partly inelevation, taken on line 1() 10, Fig. 8. Fig. 11 is a section, partly inelevation,

' taken on line 11 11, Fig. 9.

Like numerals refer to like parts throughout the several views of thedrawings.

In the drawings, Figs. 1 to 3, inclusive, 15 is the smoke-box of alocomotive of any suitable construction, 16 the smoke-stack, and 17 and18 the right and left hand cylinders, respectively, of a locomotive.

19 is the passage for exhaust-steam leading from the opposite ends ofthe cylinder 17 upwardly to the bottom of my improved exhaust-nozzle 20at the right side thereof.

21 is a passage for exhaust-steam leading from opposite ends of thecylinder 18 to the bottomof the nozzle 20 at the left-hand side thereof.

The exhaust-nozzle 2O consists of three parts-viz., an intermediateconical pipe 22, an outlettip 23, and a base 24. The outlettip 28 isfastened to the top of theintermediate pipe 22 by bolts 25 25. Theintermediate chamber 22 is fastened to the top of the base 24 by bolts26 26. The passage 19 opens into passage 27 provided in the base 24, andthe passage 21 opens into passage 28, provided in said base. Thesepassages 27 and 28 extend upwardly and terminate adjacent to the lowerend of said intermediate pipe. The outlet 29 of the passage 28 surroundsthe outlet 30 or the passage 27, and the area of the annular space ofthe outlet 29 is equal to.

the area of the outlet 30. The area of the passage through theoutlet-tip 23 is also preferably equal to the area of the outlet of thepassage 27. The periphery of the outlet end of the passage 27 is conicalinform and parallel to the interior conical wall of the intermediatepipe 22, and this conical end projects upwardly into the interior of thesaidintermediate pipe.

The operation of my improved exhaustnozzle is as follows: Exhaust-'steampassing through the passages 19 and 21 and out of the outlet 30 causes asuction in the passages 27 and 28, thus assisting the live steam in' thecylinder 18 by decreasing the back pressure in said cylinder and in likemanner steam passing upwardly through the passages 21 and 19, thusreducing the back pressure in the cylinder 17. The intermediate chamberor pipe 22 forms a combining-chamber in which the steam from thepassages 27 and 28 becomes thoroughly mixed before passing out throughthe outlet-tip 23 into the smokebox 15, and thence upwardly andoutwardly through the smoke-stack 16.

The construction of the nozzle in three parts, as hereinbeforedescribed, is very advantageous not only in the working or practicaloperation of the device 1n its connection `with the exhaust-passagesleading from the cylinders, but is also of greatadvantage and economy ofconstruction, for the reason that the outer periphery of the outlet end30 of the passage-pipe 27 is readily accessible for the purpose ofmachining the outer periphery and obtaining the correct diameter andangle with relation to the conical interior wall of the intermediatepipe 22. It is also evident that the intermediate pipe 22 may be IOOconveniently finished and machined as well as the interior of theoutlet-tip 23, and again 4to 7, inclusive, I have illustrated a modifiedoutlet-tip 232, and the base 242.

Voutlet-tip 23 and the base 24.

form of my invention in which more than two passages are provided in thebase for the exhaust-steam, and in this form of my invention 20 is thenozzle formed in three partsviz., the intermediate conical pipe 22, the

The outlettip 23 is fastened to the intermediate pipe 22 by bolts 25,and theintermediate pipe 22 is fastened to the base 24 by bolts 26. In

this form of my invention the base 24 is provided with two passages forexhaust-steam 27 27 at the right-hand side thereof, these passages beingconnected by a passage for exhaust-steam similar to the passage 19, Fig.1, to the right-hand cylinder of the locomotive. Said base is alsoprovided with an exhaust-passage 28 at the left-hand side thereof, whichpassage is connected by a suitable passage for exhaust-steam similar tothe passage 21, Fig. 1, to the left-hand cylinder of the locomotive. Thepassages 27 27 terminate at their upper ends in two conical outlets 3030, and the passage 28 is bifurcated at its upper end, as seen in Fig.4, to form two outlets 29 29, each of which surrounds one of the outlets30 30. The intermediate chamber 22 is also provided with two conicalinterior passages 31 31, which connect with two passages 32 32,extending through the outlet-tip 23.

In Figs. 8 to 11 I have illustrated another modified form of myinvention, in which 202 is the nozzle', which is made inthree parts-4viz., the intermediate conical pipe 222, the

The outlettip is fastened to the intermediate pipe by bolts 252, and thebase is fastened to t e intermediate pipe by bolts 262. In this form ofmyinvention the lower portion of the base 242 islprovided with fourpassages, two of said passages 272 27 2 being connected by suitablepassages to the right-hand cylinder of the locomotive and the other twopassages 282 282 being connected by suitable passages to the left-handcylinder of the locomotive. One of the passages 272 extends upwardly andterminates in a conical end 302, `surrounded by the outlet 292 of thepassage 282, (see Fig. 9,) while the other passage 27 2 extendsupwardly, and its outlet 302 surrounds the conical outlet end 292 of thepassage 282. (See Fig'. 10.)

In all of the various forms ofmy invention hereinbefore described,however, the nozzles saazie are made in three parts, and the outlet endof the exhaust-passage from one of the cylinders surrounds the outletend of a passage leading from the other cylinder.

What I claim, and desire by Letters Patent to secure, is-

1. An exhaust-nozzle for steam-engines, comprising in its construction.three parts fastened together, viz, an intermediate pipe having aconical interior chamber, a base fast to the lower end thereof, and anoutlet-tip fast to the upper end thereof, said base provided with twosteam-passages therein, the outlets of said passages terminatingadjacent to the lower end of said intermediate pipe and one of saidoutlets surrounding the other outlet, the areas of said outlets equalone to the other, the upper end of the inner outlet projecting upwardlyinto the interior of said intermediate pipe and having a conicalperiphery, said periphery parallel to the interior wall of said conicalinterior chamber.

2. An exhaust-nozzle for steam-engines,

comprising in its construction three parts fastened together, viz, anintermediate pipe, a base fast to the lower end thereof, an outlettipfast to the upper end thereof, said base provided with twosteam-passages therein, the outlets of said passages terminatingadjacentV to the lower end of said intermediate pipe one of said outletssurrounding the other outlet and means for detachably fastening saidparts together.

3. An exhaust-nozzle for steam-engines, comprising in its constructionthree parts fastened together, viz, an intermediate ipe provided with alurality of passages t erein, a base fast to tffe lower end of saidintermediate pipe and an outlet-tip fast tol the upper end thereof andprovided with a plurality of outlet-passages therein, said base providedwith a plurality of steam-passages therein, the outlets of saidsteam-passages terminat` ing adjacent to the lower end of saidintermediate pipe, said outlets arranged in pairs, one member of each ofsaid pairs surrounding the other member of its res ective pair.

4. An exhaust-nozz e for steam-engines, comprising in its constructionthree parts fastened together, viz, an intermediate pipe provided With-alurality of passages therein, a base fast to tllfe lower end of saidintermediate pipe and an outlet-tip fast to the upper end thereof andprovided with a plurality of outlet-passages therein, said base providedwith a plurality of steam-passages therein,

the outlets of said steam-.passages terminating adjacent to the lowerend of said intermediate pipe, said outlets arranged inl pairs onemember of each of said pairs surrounding the other member of its resective pair, and the area of one outlet of eac -pair being equal to thearea of the otheroutlet of the same pair.

5. An exhaust-nozzle for steam-engines comprising in its constructionthree parts fas- IISG tened together, viz, an intermediate pipe providedwith a plurality of conical inner chambers, a base fast to the lower endthereof, an outlet-tip fast to the upper end thereof and provided with aplurality of outlet-passages therein, said base provided with aplurality of steam-passages therein the outlets of said other, the upperend of the inner outlet of each pair projecting upwardly into one ofsaid conical interior chambers respectively and having a conicalperiphery, said periphery parallel to the interior wall of itsrespective conical interior chamber. t

In testimony whereof I have hereunto set steam-passages terminatingadjacent to the my hand in presence of two subscribing witlower end ofsaid intermediate pipe, said outnesses.

lets arranged in pairs, one member of each of said pairs surrounding theother member of its respective pair, the areas of the outlets of each ofsaid pairs being equal one to the I CHARLES S. MILLS. Witnesses:

CHARLES S. GooDrNG, LoUis A. JONES.

